diff --git a/src/common/common.cpp b/src/common/common.cpp
index 432cd5edd..619f99854 100644
--- a/src/common/common.cpp
+++ b/src/common/common.cpp
@@ -15,7 +15,9 @@
 
 #ifdef SYS_WINDOWS
 # include <windows.h>
-#endif
+#elsif defined(HAVE_UNISTD_H)
+# include <unistd.h>
+#endif  // HAVE_UNISTD_H
 #if defined(HAVE_SYS_SYSCALL_H)
 # include <sys/syscall.h>
 #endif
diff --git a/src/common/dts.cpp b/src/common/dts.cpp
index a47b7e580..fc2732883 100644
--- a/src/common/dts.cpp
+++ b/src/common/dts.cpp
@@ -14,6 +14,10 @@
 
 #include "common/common_pch.h"
 
+#if defined(HAVE_UNISTD_H)
+# include <unistd.h>
+#endif  // HAVE_UNISTD_H
+
 #include "common/bit_cursor.h"
 #include "common/dts.h"
 #include "common/endian.h"
diff --git a/src/input/r_dts.cpp b/src/input/r_dts.cpp
index bfee08c7d..e329f9137 100644
--- a/src/input/r_dts.cpp
+++ b/src/input/r_dts.cpp
@@ -14,6 +14,10 @@
 
 #include "common/common_pch.h"
 
+#if defined(HAVE_UNISTD_H)
+# include <unistd.h>
+#endif  // HAVE_UNISTD_H
+
 #include "common/codec.h"
 #include "common/debugging.h"
 #include "common/dts.h"
diff --git a/src/input/r_wav.cpp b/src/input/r_wav.cpp
index e7efde1c7..d29594fc7 100644
--- a/src/input/r_wav.cpp
+++ b/src/input/r_wav.cpp
@@ -16,6 +16,9 @@
 #include "common/common_pch.h"
 
 #include <algorithm>
+#if defined(HAVE_UNISTD_H)
+# include <unistd.h>
+#endif  // HAVE_UNISTD_H
 
 #include "avilib.h"
 #include "common/ac3.h"